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From Amin Mohammed-Coleman <>
Subject SpellChecker in use with composite query
Date Fri, 10 Apr 2009 13:28:10 GMT
I have been playing around with the SpellChecker class and so far it looks
really good.  While developing a testcase to show it working I came across a
couple of issues which I have resolved but I'm not certain if this is the
correct approach.  I would therefore be grateful if anyone could tell me
whether it is correct or I should try something else.

1) Multple Indexes:
I have multiple indexes which store different documents based on certain
subject matter.  So inorder to perform the spellchecking against all indexes
I did something like this:

IndexReader spellReader =;

IndexReader spellReader2 =;

MultiReader multiReader = new MultiReader(new IndexReader[]

LuceneDictionary luceneDictionary = new LuceneDictionary(multiReader,

Directory spellDirectory = FSDirectory.getDirectory(<single index for

SpellChecker spellChecker = new SpellChecker(spellDirectory);


Is this an acceptable approach or should there be a spellcheck index for
each seperate document index?

2) Composite query e.g. Luciene OR doqument

Inorder to handle the above i did the following:

QueryParser queryParser = new AnalyzingQueryParser("content",analyzer);

String input = "luciene OR doqument";

Query query = queryParser.parse(input);

String input2 = query.toString("content");

String[] splitString = input2.split(" ");

For each of the string in the array i performed the suggestSimilar(..).

Is this the most appropriate way of doing this?

Any help would be appreciated.



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